If you already 
  have you Xbox composite connectors attached to your Television and Xbox, just 
  switch off the Xbox, remove them and then plug in the S-Video cable from the 
  Xbox to the Television's s-video connector on either the front (most 
  Television's) or back of your television. The cable also has a digital output 
  jack which means you can start to use Dolby Digital 5.1 surround sound if you 
  have speakers and amp capable of it.